Hydraulic pump to weed eater platform

[63DH8]

63DH8,

How large do you think that rebar cutter is from HF. It uses 10,000 psi, and that can be obtained from just about ant hand pump, or one of the air motor driven hydraulic pumps. That is probably a carbide head on there, and is rated at 12 mm, or.47 in, a little smaller than 1/2 in. If this were mounted on a solid line capable of 10,000 psi he could reach to whatever distance he wanted. If he is dead set on a weed eater engine, I just don't know. Probably the nitrogen would work. We still don't know the full extent of what he is trying to do. The rebar may be inside a pile of cement/rebar rubble. I have something that would cut just about anything, and that is the jet rods, or Exothermic/Slice rods. just need oxygen.

All true, but why give the man a fish when he could be taught to fish? Besides, he said he's educated. BSEE and all.

 

[Brad_Blazer]

In the manual for the HF cutter the stated capacity is actually 3/16 to 1/2" so it meets the OP requirement.

The HF unit can produce a maximum force of 8 tons at 14,500psi indicating a cylinder area of 1.1 square inches. Probably a good baseline for calculating power requirements. To go 1/2" in 1 second pushing 16,000lb requires about 1.21 horsepower. Let's say a total of 2HP is required due to friction. That number can be divided by the number of seconds allowed to accomplish the task. A typical weedeater is about 1hp so it should be able to make the cut in 2 seconds. If you allow 10 seconds, it only takes 0.2hp or 150 watts - pretty close to what a cordless tool can do.

I can't believe you guys got me to do this much of Mr. BS's work!

 

[SPYDERLK]

You still did not answer my question, and please don't answer or reference any of my post.

I am seriously thinking of adding you to my ignore list.

Think this out JJ. 1" = 2.54cm, 1cm = 10mm. Therefore 1"=25.4mm. Then 12mm = 12/25.4 inches = 0.472 inches......A little more than 15/32"
larry

 

[BrentD]

Having been on a BUNCH of internet forums over the years, I can make a few guesses about the OP:

#1. English is not his native language, and I suspect he is not from in English speaking country.

#2. He has an idea for a product he thinks is the next "Big Thing". (Probably has watched too many episodes of Dragon's Den or Pitch Men)

#3 He has absolutely NO concept of the principles behind what he is trying to design, and thus wants US to do the work for him so he can then patent "his" design.

I could, in very little time, put together a working design for exactly what he wants, but knowing my luck Billy Mays would decide it's a really great product for him to scream about and my work would make some schmuck who was too lazy to learn to design things on his own a quick buck and I'd still be sitting here oblivious.

It's incredibly rude to come on a forum, make demands and then call the people who tried to help you fools because you don't have enough comprehension of your own topic to realize they were being serious. Being rude may get things done wherever you come from, but where, I come from it just makes people mad. (And yes, I am a bit angry after reading the first two posts. It just doesn't sit well with me.)

 

[BrentD]

All true, but why give the man a fish when he could be taught to fish? Besides, he said he's educated. BSEE and all.

I think you can safely drop the EE in his "degree". He quite obviously has a degree in BS though. (Either that or somebody has resurrected Rube Goldberg)

 

[Scooby074]

Think this out JJ. 1" = 2.54cm, 1cm = 10mm. Therefore 1"=25.4mm. Then 12mm = 12/25.4 inches = 0.472 inches......A little more than 15/32"
larry

Or better yet What is 12 mm in inches? - Google Search

 

[Soundguy]

You still did not answer my question, and please don't answer or reference any of my post.

I am seriously thinking of adding you to my ignore list.

I reccomend it...It's one of the most stress relieving things I've done lately

soundguy

 

[63DH8]

I think you can safely drop the EE in his "degree". He quite obviously has a degree in BS though. (Either that or somebody has resurrected Rube Goldberg)

I dunno. It kinda fits. Degreed in BSEE=Degreed in Bovine Scatology and Equine Excrementology!

 

[J_J]

Think this out JJ. 1" = 2.54cm, 1cm = 10mm. Therefore 1"=25.4mm. Then 12mm = 12/25.4 inches = 0.472 inches......A little more than 15/32"
larry

Thanks Larry. I just don't work with mm or metric system and all I wanted was a simple answer like [ 12 mm is .47 in ] So I did what I should have in the first place when I don't have an answer. I get on the Internet, and find conversion tables. I post about things that I know, or what someone wants to know, and try not to leave one guessing.

 

[wvpolekat]

Thanks Larry. I just don't work with mm or metric system and all I wanted was a simple answer like [ 12 mm is .47 in ] So I did what I should have in the first place when I don't have an answer. I get on the Internet, and find conversion tables. I post about things that I know, or what someone wants to know, and try not to leave one guessing.

I have an easy way I keep them in my head. 1/2 inch wrench is very close to a 13mm wrench. So, that makes 1 inch twice that, or 26mm. It's not exact at all, but it will get you in the ballpark.

May or may not work for you, but it helps me do quick conversions in my head. Linear associations like that are how I remember many things, particularly conversions and dates. It's actually easier for me to remember that someones birthday is 60 days after a particular date than it is to remember the actual date. Just how I do things.